Windows Defender or third-party antivirus software often flags decompression as suspicious activity.

The following steps are established methods to resolve the error on Windows 11:

Expand > Maximum processor state . Set both "On battery" and "Plugged in" to 99% . 3. Update Visual C++ Redistributables

Some older installers have compatibility quirks with Windows 11.

Is this happening with a , or multiple different files ? What is your PC's total physical RAM size?

Troubleshooting "unarc.dll returned an error code 11" on Windows 11